thymine dimer in a sentence
Examples
- One of the common mutations of DNA involves two adjacent thymines or cytosine, which, in presence of ultraviolet light, may form thymine dimers, causing " kinks " in the DNA molecule that inhibit normal function.
- Because of course the photon doesn't generally " energize " all the DNA in your nucleus and cause damage to it by some hazy mechanism afterward; it interacts with one specific thymine dimer or the like.
- For example, high energies can induce a double strand break while much more sedate chemical reactions like thymine dimers from even UV light can lead to the modification of a single base pair . talk ) 23 : 43, 8 November 2016 ( UTC)
- UVA also produces reactive oxygen species and these inflict other DNA damage, primarily single-strand breaks, oxidized pyrimidines and the oxidized purine 8-oxoguanine ( a mutagenic DNA change ) at 1 / 10th, 1 / 10th and 1 / 3rd the frequencies of UVA-induced thymine-thymine dimers, respectively.
- Dior laboratories have demonstrated in laboratory tests that the application of a Vitamin C derivative to a sample of isolated skin exposed to UV rays, reduces the level of thymine dimers ( photo-products of cell degeneration ), showing a protective effect of the vitamin against the damage of UV rays.
- UVA can generate highly reactive chemical intermediates, such as hydroxyl and oxygen radicals, which in turn can damage DNA . The DNA damage caused indirectly to skin by UVA consists mostly of single-strand breaks in DNA, while the damage caused by UVB includes direct formation of thymine dimers or other pyrimidine dimers, and double-strand DNA breakage.